Edward f



@einen gieten gatwt @frn EDWARDF.v BRADLEY, O'F BIRMINGHAM, CONNECTICUT, ASSIGNOR T0 i HOWE MANUFACTURINGCOMPANY, OF SAME PLACE.

Letters Patent No. 72,718, dated December 3l, 186i'.

IMPROVEMENT IN HEAD-ROLLS FOB. PIN-MAGHINES.

`IO ALL WHOM IT MAY CONCERN:

Be it known that I, EDWARD F. BRADLEY, of Birmingham,'in`the county of New Haven, and State of Connecticut, have invented a new Improvement in Head-Rolls for Pin-Machine; and Ido hereby declare the following, when taken in connection with the accompanying drawings, and the letters of referencemarked thereon,- to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, inli i Figure 1, a side view', and in Figure 2 a top view. l

Thislinvention is designed tobe placed in connection with pin-machinery,- the object being to roll the head, to remove the burr, and smooth and finish the edge; and consists in the arrangement of two grooved rolls, of diterent diameters, revolving in the same direction, and in such relative positionv to the carrier that the pin, when passing from the machine, will enter the groeve in the said rolls, and pass down between the same, in whiehoperatmn the head is rolled and the edge nishe'd.

same as illustrated in the accompanying drawings.

A represents the carrier of a pin-machine, into whichv the pins are inserted in any convenient manner in their passage from the machine, and after the head has been formed. B C aretwo rolls, caused to revolve in the same direction, as'denoted in tig. 1, the one, B, being of larger diameter than the other, C, andboth grooved into the form in which it is' desired to finish the edge ol' the head, andthe said rolls located in such relative position to the carrier A,A that the carrier in its movement will present the vheaded pins to the rolls, and guide the pin into the groove, so that the pin will-pass down between the two rolls B C.

To enable others skilled in the art to construct and use myf improvement, I will proceed to describe the The revolution ofthe two rolls being equal, but of different diameters, the periphery 'of thelarger'mustl consequently move' faster than the periphery of the smaller, therefore, as the head passes through between the two, the slower-moving surface holds upon one side of `the head, while the quicker-moving surface of the other will cause the pinto revolve, and Athus be rolled entirely around its surface. p

This object may alsobe attained by melting the two rolls of equal diameter, and varying their revolution so that the one will move quicker 'than'v the other, but, in either case, the movement of theA carrier must be adjusted so that the carrier willnot force the pin'threugh between the rolls, but simply moving as fast as the revolutionof the rolls carry the pin through between them. Either of the two rolls, or both, may be arranged so as to 'be self-adjusted by means ot' a spring. This would allow a slight yielding of the roll, to accommodate the variation in the size of the head, and may be adjusted to diferent-sized'heads, as compressing-rolls in other machines. v

Having thus fully described my.inventio.n,'what I claim as new and useful, and desire to secure by Letters Patent, is l The combination of the two wheels B C, having a groove formed in each of their peripheries, and revolving at di'erent surface velocities, when arranged in relative position to the carrying-device, .substantially in the manner herein set forth. p

EDWARD F. BRADLEY.

Witnesses HENRY T. BLAKE, Jouw H. SHUMWAY. 

